/*
 * Copyright (c) 2009 Enio Perpetuo
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); 
 * you may not use this file except in compliance with the License. 
 * You may obtain a copy of the License at 
 * 
 * 		http://www.apache.org/licenses/LICENSE-2.0
 *  
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" BASIS, 
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
 * See the License for the specific language governing permissions and 
 * limitations under the License.
 *  
 */
package co.za.gvi.smart;

/**
 * This class supports the creation of items for smart messaging enabled phones.
 * <p>
 * A SmartMessage may be a <code>VCard</code> or a <code>VCalendar</code>.
 * 
 * @author Enio Perpetuo
 */
public abstract class SmartMessage {
	
	/** Constant for carriage return and line feed */
	protected static final String CRLF = "\r\n";

	protected StringBuilder builder;

	@Override
	public abstract String toString();
	
	protected void append(String value, String header) {
		if(value != null) {
			builder.append(header);
			builder.append(value);
			builder.append(CRLF);
		}
	}
}
